AR016244A1 - Un metodo para determinar una senal de ajuste de seguimiento de demora de ventana de busqueda para un receptor radio celular de una disposicion decomunicacion de acceso multiple por division de codigo. una unidad de seguimiento de ventana de busqueda para llevar a la practica dicho metodo y una radi - Google Patents

Un metodo para determinar una senal de ajuste de seguimiento de demora de ventana de busqueda para un receptor radio celular de una disposicion decomunicacion de acceso multiple por division de codigo. una unidad de seguimiento de ventana de busqueda para llevar a la practica dicho metodo y una radi

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Publication number
AR016244A1
AR016244A1 ARP990102034A ARP990102034A AR016244A1 AR 016244 A1 AR016244 A1 AR 016244A1 AR P990102034 A ARP990102034 A AR P990102034A AR P990102034 A ARP990102034 A AR P990102034A AR 016244 A1 AR016244 A1 AR 016244A1
Authority
AR
Argentina
Prior art keywords
search window
delay
error
cir
determining
Prior art date
Application number
ARP990102034A
Other languages
English (en)
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of AR016244A1 publication Critical patent/AR016244A1/es

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7113—Determination of path profile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)

Abstract

Un método para determinar una senal de ajuste de seguimiento de demora de ventana de busqueda para receptor radio celular de una disposicion decomunicacion de acceso multiple por division de codigo CDMA. Una respuesta al impulso del canal es estimadapara una senal recibida que contiene multiplestrayectos, que cada trayecto tiene una correspondiente demora de trayecto. Una ventana de busqueda define un perfil de demora que contiene los multiplestrayectos de la senal recibida. Una demora media opromedio es calculada para la respuesta al impulso del canal (CIR) estimada, y un error es determinado entrela demora media de la CIR y una posicion de demora deseada que corresponde al centro de la ventana de busqueda de la CIR. Un ajuste es hecho para reducir eseerror de forma que el centro de la ventana de busqueda y la demora media de la CIR están alineadas. El error puede ser procesado linealmente o no linealmentepara hacer mínimo el error y para reducir una influencia del ruido. La invencion también propone una unidad de seguimiento de ventana de busqueda para llevar ala práctica dicho método en un radio receptor y que incluye un procesador de valores de demora y magnitud de los trayectos, un detector de error y controladorpara ajustar el error.
ARP990102034A 1998-05-01 1999-04-30 Un metodo para determinar una senal de ajuste de seguimiento de demora de ventana de busqueda para un receptor radio celular de una disposicion decomunicacion de acceso multiple por division de codigo. una unidad de seguimiento de ventana de busqueda para llevar a la practica dicho metodo y una radi AR016244A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/070,778 US6370397B1 (en) 1998-05-01 1998-05-01 Search window delay tracking in code division multiple access communication systems

Publications (1)

Publication Number Publication Date
AR016244A1 true AR016244A1 (es) 2001-06-20

Family

ID=22097337

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP990102034A AR016244A1 (es) 1998-05-01 1999-04-30 Un metodo para determinar una senal de ajuste de seguimiento de demora de ventana de busqueda para un receptor radio celular de una disposicion decomunicacion de acceso multiple por division de codigo. una unidad de seguimiento de ventana de busqueda para llevar a la practica dicho metodo y una radi

Country Status (11)

Country Link
US (1) US6370397B1 (es)
EP (1) EP1082820B1 (es)
JP (1) JP4242563B2 (es)
KR (1) KR100689993B1 (es)
CN (1) CN1135725C (es)
AR (1) AR016244A1 (es)
AU (1) AU755811B2 (es)
CA (1) CA2330926C (es)
DE (1) DE69932929T2 (es)
TW (1) TW428375B (es)
WO (1) WO1999057819A1 (es)

Families Citing this family (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6731622B1 (en) * 1998-05-01 2004-05-04 Telefonaktiebolaget Lm Ericsson (Publ) Multipath propagation delay determining means using periodically inserted pilot symbols
JP2000031889A (ja) * 1998-07-13 2000-01-28 Hitachi Ltd スペクトラム拡散通信方式の移動通信端末
US6765953B1 (en) * 1998-09-09 2004-07-20 Qualcomm Incorporated User terminal parallel searcher
US6323805B1 (en) 1998-09-09 2001-11-27 Qualcomm, Inc. Data boundary aware base station assisted position location
DE19845620A1 (de) * 1998-10-05 2000-04-27 Systemonic Ag Verfahren zum Empfang von Spreizspektrumsignalen
AU3705599A (en) * 1999-03-30 2000-10-23 Nokia Networks Oy Estimation of signal to interference ratio in a mobile communication system
JP3322240B2 (ja) * 1999-05-10 2002-09-09 日本電気株式会社 Ｃｄｍａ受信機
JP3367475B2 (ja) * 1999-07-06 2003-01-14 日本電気株式会社 無線通信機および無線通信機の消費電力制御方法
US6633559B1 (en) * 1999-08-11 2003-10-14 Ericsson Inc. Apparatus and methods for extended base station range using staggered uplink frame structures
US6574235B1 (en) * 1999-08-12 2003-06-03 Ericsson Inc. Methods of receiving co-channel signals by channel separation and successive cancellation and related receivers
FI19991871A (fi) * 1999-09-02 2001-03-02 Nokia Networks Oy Menetelmä signaalikomponenttien käsittelemiseksi kommunikaatiojärjestelmässä ja vastanotin
KR20010028099A (ko) * 1999-09-17 2001-04-06 박종섭 코드 분할 다중 접속방식을 이용한 수신기에서의 동기 추적장치 및 그 방법
JP3279297B2 (ja) * 1999-09-24 2002-04-30 日本電気株式会社 Ｃｄｍａ移動通信受信方式におけるサーチ方法および受信装置
US6831956B1 (en) * 1999-09-28 2004-12-14 Texas Instruments Incorporated Wireless communications system with combining of multiple paths selected from sub-windows in response to the primary synchronization channel
US6829290B1 (en) 1999-09-28 2004-12-07 Texas Instruments Incorporated Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel
IL133451A0 (en) * 1999-12-10 2001-04-30 Dspc Tech Ltd Programmable convolver
US6577616B1 (en) * 1999-12-29 2003-06-10 Nortel Networks Limited Systems and methods for implementing large CDMA cell sizes
JP3387471B2 (ja) * 2000-02-14 2003-03-17 日本電気株式会社 スペクトラム拡散通信方式受信機およびスペクトラム拡散通信のパスサーチ方法
DE10012875B4 (de) * 2000-03-16 2004-04-01 Infineon Technologies Ag Mobilfunkempfänger
JP3440919B2 (ja) * 2000-04-07 2003-08-25 日本電気株式会社 マルチパス検出回路
SE0003289D0 (sv) * 2000-05-18 2000-09-15 Ericsson Telefon Ab L M Radio receiver and channel estimator
US6956841B1 (en) * 2000-05-24 2005-10-18 Nokia Networks Oy Receiver and method of receiving a desired signal
SE0002587D0 (sv) * 2000-07-07 2000-07-07 Ericsson Telefon Ab L M Rake receiver and method related to a rake receiver
JP4265864B2 (ja) * 2000-08-15 2009-05-20 富士通株式会社 同期追跡回路
GB0022634D0 (en) * 2000-09-15 2000-11-01 Koninkl Philips Electronics Nv Secondary station and method of operating the station
US20030012270A1 (en) * 2000-10-06 2003-01-16 Changming Zhou Receiver
JP3476009B2 (ja) * 2000-10-11 2003-12-10 日本電気株式会社 Ｃｄｍａ通信システムにおける移動局及びそのフィンガー割り当て方法
US6807227B2 (en) * 2000-10-26 2004-10-19 Rockwell Scientific Licensing, Llc Method of reconfiguration of radio parameters for power-aware and adaptive communications
JP4515618B2 (ja) * 2000-10-31 2010-08-04 株式会社東芝 移動通信端末
JP3428637B2 (ja) * 2000-11-27 2003-07-22 日本電気株式会社 Ｃｄｍａ受信機のマルチパス検出方法および回路
US6907245B2 (en) 2000-12-04 2005-06-14 Telefonaktiebolaget Lm Ericsson (Publ) Dynamic offset threshold for diversity handover in telecommunications system
US6980803B2 (en) * 2000-12-04 2005-12-27 Telefonaktiebolaget Lm Ericsson (Publ) Using statistically ascertained position for starting synchronization searcher during diversity handover
US6954644B2 (en) 2000-12-04 2005-10-11 Telefonaktiebolaget Lm Ericsson (Publ) Using geographical coordinates to determine mobile station time position for synchronization during diversity handover
KR100488078B1 (ko) * 2000-12-21 2005-05-09 엘지전자 주식회사 이동 통신 시스템 수신단의 파일럿 신호 검색기 및 방법
US7778312B2 (en) * 2000-12-22 2010-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for selecting demodulation processing delays in a receiver
JP2002208879A (ja) * 2001-01-05 2002-07-26 Nec Microsystems Ltd 同期タイミング補正回路および方法
JP3838877B2 (ja) * 2001-01-15 2006-10-25 日本電気株式会社 パスサーチを行うｃｄｍａ受信装置、パスサーチ方法、及びプログラム
FI109311B (fi) * 2001-03-16 2002-06-28 Nokia Corp Menetelmä informaatioelementin reunan määrittämiseksi, järjestelmä ja elektroniikkalaite
US7340279B2 (en) * 2001-03-23 2008-03-04 Qualcomm Incorporated Wireless communications with an adaptive antenna array
US20020173286A1 (en) * 2001-04-06 2002-11-21 Bengt Lindoff Radiocommunication employing selected synchronization technique
US7161927B2 (en) * 2001-04-18 2007-01-09 Mediatek Inc. System and method for synchronizing multiuser signals for OFDM CDMA
US20030036374A1 (en) * 2001-06-04 2003-02-20 Time Domain Corporation Wireless local area network using impulse radio technology to improve communications between mobile nodes and access points
US7058399B2 (en) 2001-07-11 2006-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Search window delay tracking in code division multiple access communication systems
US6874113B2 (en) * 2001-09-17 2005-03-29 Interdigital Technology Corporation Radio resource control-service data unit reception
US6456648B1 (en) * 2001-10-01 2002-09-24 Interdigital Technology Corporation Code tracking loop with automatic power normalization
US6728304B2 (en) * 2001-12-18 2004-04-27 Motorola, Inc. Method and apparatus for performing a signal detection and assignment in a wireless communication system
US6748013B2 (en) * 2002-02-12 2004-06-08 Interdigital Technology Corporation Receiver for wireless telecommunication stations and method
US6748009B2 (en) * 2002-02-12 2004-06-08 Interdigital Technology Corporation Receiver for wireless telecommunication stations and method
AU2002235966A1 (en) * 2002-03-04 2003-09-16 Nokia Corporation Receiving spread spectrum signal in radio system
US6757321B2 (en) * 2002-05-22 2004-06-29 Interdigital Technology Corporation Segment-wise channel equalization based data estimation
US7075972B2 (en) * 2002-08-19 2006-07-11 Mitsubishi Electric Research Laboratories, Inc. Intra-cell interference cancellation in a W-CDMA communications network
US20040042411A1 (en) * 2002-08-30 2004-03-04 Erik Dahlback Method and apparatus for controlling the rate of path searching in a communications system
US7142586B2 (en) 2002-09-18 2006-11-28 Telefonaktiebolaget Lm Ericsson (Publ) Robust delay estimation architecture
US20040072553A1 (en) * 2002-09-20 2004-04-15 Xiaohui Wang Methods, systems, and computer program products for selecting delay positions for a RAKE receiver by adjusting the delay positions based on comparisons of signal to interference ratios and/or powers for multi-path signals over time
US20040062298A1 (en) * 2002-10-01 2004-04-01 Mcdonough John G. System and method for detecting direct sequence spread spectrum signals using pipelined vector processing
TW200522751A (en) * 2003-03-05 2005-07-01 Interdigital Tech Corp Received communication signal processing methods and components for wireless communication equipment
DE60303496D1 (de) * 2003-05-27 2006-04-20 Ericsson Telefon Ab L M Positionierung eines Recherchegleitfensters zum Mehrwegsignalenempfäng
WO2004107599A1 (en) * 2003-05-27 2004-12-09 Telefonaktiebolaget L M Ericsson (Publ) Positioning a multipath search window
WO2004112269A1 (en) * 2003-06-13 2004-12-23 Telefonaktiebolaget Lm Ericsson (Publ) Positioning a multipath search window
EP1487127B1 (en) * 2003-06-13 2007-09-12 Telefonaktiebolaget LM Ericsson (publ) Method and apparatus for positioning a multipath search window
KR20050012490A (ko) * 2003-07-25 2005-02-02 유티스타콤코리아 유한회사 이동통신 시스템에서의 호 셋업시 다중 액세스 채널 할당방법
GB2404822B (en) * 2003-08-07 2007-07-11 Ipwireless Inc Method and arrangement for noise variance and sir estimation
JP3943062B2 (ja) 2003-08-25 2007-07-11 シャープ株式会社 Ｃｄｍａ受信装置、ｃｄｍａ受信方法、ｃｄｍａ受信プログラム、及び、プログラム記録媒体
DE60330453D1 (de) * 2003-08-26 2010-01-21 Ericsson Telefon Ab L M Positionierung eines Pfadsucherfensters in einem CDMA-Empfänger
US7308286B2 (en) * 2003-11-20 2007-12-11 Telefonaktiebolaget Lm Ericsson (Publ) Multi-dimensional joint searcher and channel estimators
US20050113142A1 (en) * 2003-11-20 2005-05-26 Telefonaktiebolaget Lm Ericsson (Publ) Temporal joint searcher and channel estimators
US20050113141A1 (en) * 2003-11-20 2005-05-26 Telefonaktiebolaget Lm Ericsson (Publ) Spatial joint searcher and channel estimators
KR100565316B1 (ko) * 2003-11-28 2006-03-30 엘지전자 주식회사 다중경로에서 휴대단말기의 동기 경로 결정방법
US6917904B1 (en) 2004-01-12 2005-07-12 Telefonaktiebolaget L M Ericsson (Publ) Method of and apparatus for path-searcher window positioning
US7362792B2 (en) * 2004-01-12 2008-04-22 Telefonaktiebolaget Lm Ericsson (Publ) Method of and apparatus for computation of unbiased power delay profile
EP1655854A1 (en) * 2004-11-03 2006-05-10 Alcatel Method for calculating a path profile in a cellular communication system
US7573933B2 (en) * 2005-01-04 2009-08-11 Mitsubishi Electric Research Laboratories, Inc. Adaptive delay adjustment for transmitted reference impulse radio systems
US7620369B2 (en) * 2005-01-04 2009-11-17 Mitsubishi Electric Research Laboratories, Inc. Adaptive frame durations for time-hopped impulse radio systems
US8175123B2 (en) * 2005-03-10 2012-05-08 Qualcomm Incorporated Collection window positioning using time tracking information
US8436773B2 (en) * 2005-04-19 2013-05-07 Qualcomm Incorporated Method for leveraging diversity for enhanced location determination
CN1707989B (zh) * 2005-05-13 2010-12-22 上海宣普实业有限公司 码分多址系统中定时跟踪的路径搜索方法
CN1897472B (zh) * 2005-07-13 2010-05-05 财团法人工业技术研究院 无线通讯系统时序搜索区间的区间位置及大小的调整方法
KR100906125B1 (ko) * 2005-09-26 2009-07-07 삼성전자주식회사 광대역 무선 통신시스템에서 패스트 피드백 정보를검파하기 위한 장치 및 방법
US20080151969A1 (en) * 2006-12-21 2008-06-26 Andres Reial Efficient Delay Profile Computation with Receive Diversity
US7724808B2 (en) * 2006-12-21 2010-05-25 Telefonaktiebolaget Lm Ericsson (Publ) Efficient delay profile computation with receive diversity
US7839831B2 (en) * 2007-01-08 2010-11-23 Qualcomm Incorporated Methods and apparatus for time tracking using assistance from TDM pilots in a communication network
EP2140561B1 (en) * 2007-04-26 2017-12-13 Samsung Electronics Co., Ltd. A method and an apparatus for estimating a delay spread of a multipath channel
TWI350669B (en) * 2007-10-22 2011-10-11 Sunplus Mmobile Inc Method and apparatus for timing controlling of channel estimation
US8055278B2 (en) * 2008-11-20 2011-11-08 Telefonaktiebolaget L M Ericsson (Publ) Systems and methods for tracking power peaks of a signal
JP5446698B2 (ja) * 2009-10-05 2014-03-19 日本電気株式会社 干渉電力推定装置、干渉電力推定方法、および干渉電力推定プログラム
CN101873151B (zh) * 2010-06-24 2014-04-30 中兴通讯股份有限公司 固定搜索窗模式下搜索窗中心设置的方法及装置
WO2012015185A2 (en) * 2010-07-28 2012-02-02 Lg Electronics Inc. Method and apparatus for channel estimation in multi-path channel
US8737506B1 (en) * 2010-12-29 2014-05-27 Sprint Communications Company L.P. Determination of transmit diversity transmission delays
US8565686B2 (en) 2011-06-30 2013-10-22 Sprint Communications Company L.P. Power status multipath search window sizing for wireless communications
US9178562B2 (en) * 2012-07-16 2015-11-03 Qualcomm Incorporated Method and apparatus to dynamically select UE processing capabilities based on channel impulse response estimates
FR3012275B1 (fr) * 2013-10-18 2015-12-25 Commissariat Energie Atomique Recepteur uwb a fonctionnement intermittent
US20150338512A1 (en) * 2014-05-23 2015-11-26 Qualcomm Incoporated Round trip time accuracy improvement in varied channel environments
CN104092640B (zh) * 2014-06-19 2018-03-23 北京交通大学 一种ofdm系统下定时误差估计的方法
US9621205B2 (en) * 2015-03-26 2017-04-11 Vt Idirect, Inc. Apparatus and method for frequency estimation ambiguity removal of a burst signal
CN105895114B (zh) * 2016-03-22 2019-09-27 南京大学 一种基于脉冲响应的房间声传播路径分离方法
US10477449B2 (en) * 2016-08-26 2019-11-12 Veniam, Inc. Systems and methods for route selection in a network of moving things, for example including autonomous vehicles
CN108880661B (zh) * 2018-07-02 2020-09-04 成都国恒空间技术工程有限公司 一种非相干门限判决帧同步方法、装置及其可读存储介质
FR3083947B1 (fr) * 2018-07-16 2020-07-17 Enensys Technologies Procede de correction d'une reponse impulsionnelle d'un canal de propagation multi-trajets, produit programme d'ordinateur et dispositif correspondants.
FR3086820B1 (fr) * 2018-10-02 2021-05-28 Enensys Tech Procede de correction d'une reponse impulsionnelle d'un canal de propagation, produit programme d'ordinateur et dispositif correspondants
US11552662B1 (en) 2021-08-30 2023-01-10 Rockwell Collins, Inc. Method for improving detection in multipath channels

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03195129A (ja) * 1989-12-22 1991-08-26 Mitsubishi Electric Corp 最尤系列推定装置
US5263026A (en) * 1991-06-27 1993-11-16 Hughes Aircraft Company Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver
US5267261A (en) 1992-03-05 1993-11-30 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
US5414734A (en) * 1993-01-06 1995-05-09 Glenayre Electronics, Inc. Compensation for multi-path interference using pilot symbols
US5818876A (en) * 1993-02-01 1998-10-06 Motorola, Inc. Method and apparatus of adaptive maximum likelihood sequence estimation using a variable convergence step size
US5406593A (en) 1993-08-20 1995-04-11 General Electric Company Adaptive phase-locked loop employing channel state information estimation from received signal phase angles
JP3560991B2 (ja) * 1993-09-20 2004-09-02 株式会社東芝 適応型最尤系列推定装置
GB2282300B (en) * 1993-09-22 1997-10-22 Northern Telecom Ltd Communications system and receiver devices therefor
FI98974C (fi) * 1993-09-24 1997-09-10 Nokia Telecommunications Oy Menetelmä sektoroidun tukiaseman toiminnan varmistamiseksi sekä tukiasema
US5490165A (en) 1993-10-28 1996-02-06 Qualcomm Incorporated Demodulation element assignment in a system capable of receiving multiple signals
US5533063A (en) * 1994-01-31 1996-07-02 The Regents Of The University Of California Method and apparatus for multipath channel shaping
ZA957858B (en) 1994-09-30 1996-04-22 Qualcomm Inc Multipath search processor for a spread spectrum multiple access communication system
SE504787C2 (sv) 1994-12-14 1997-04-28 Hd Divine Ab Metod vid OFDM-mottagning för korrigering av frekvens, tidsfönster, samplingsklocka och långsamma fasvariationer
US5654979A (en) 1995-01-13 1997-08-05 Qualcomm Incorporated Cell site demodulation architecture for a spread spectrum multiple access communication systems
FI97581C (fi) 1995-02-10 1997-01-10 Nokia Telecommunications Oy Vastaanotin ja menetelmä hajotuskoodien generoimiseksi vastaanottimessa
FI105512B (fi) * 1995-05-24 2000-08-31 Nokia Networks Oy Menetelmä kulmatoisteen aikaansaamiseksi sekä tukiasemalaitteisto
ZA965340B (en) 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
FR2737362B1 (fr) * 1995-07-25 1997-10-10 Matra Communication Procede de selection des retards de propagation retenus pour recevoir des messages transmis par radiocommunication a etalement de spectre
FI100017B (fi) * 1995-08-29 1997-08-15 Nokia Telecommunications Oy Yhteyden laadun estimointimenetelmä ja vastaanotin
US5892801A (en) * 1996-03-04 1999-04-06 Adtran, Inc. Decision path reduction of M-ary tree-search detector
US6121927A (en) * 1996-10-29 2000-09-19 Nokia Telecommunications Oy Determination of terminal location in a radio system
JPH1141115A (ja) * 1997-07-23 1999-02-12 Mitsubishi Electric Corp ディジタルデータ復調装置
JP2914445B2 (ja) * 1997-08-05 1999-06-28 日本電気株式会社 Ｃｄｍａ適応受信装置
US6185251B1 (en) * 1998-03-27 2001-02-06 Telefonaktiebolaget Lm Ericsson Equalizer for use in multi-carrier modulation systems
US6144861A (en) * 1998-04-07 2000-11-07 Telefonaktiebolaget Lm Ericsson Downlink power control in a cellular mobile radio communications system

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CA2330926C (en) 2010-02-02
JP4242563B2 (ja) 2009-03-25
EP1082820B1 (en) 2006-08-23
CA2330926A1 (en) 1999-11-11
US6370397B1 (en) 2002-04-09
AU4302699A (en) 1999-11-23
CN1135725C (zh) 2004-01-21
DE69932929T2 (de) 2007-04-19
AU755811B2 (en) 2002-12-19
TW428375B (en) 2001-04-01
DE69932929D1 (de) 2006-10-05
WO1999057819A1 (en) 1999-11-11
CN1308790A (zh) 2001-08-15
KR100689993B1 (ko) 2007-03-08
JP2002514032A (ja) 2002-05-14
EP1082820A1 (en) 2001-03-14
KR20010043229A (ko) 2001-05-25

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